23131203131 has 8 divisors (see below), whose sum is σ = 23217440400. Its totient is φ = 23045080608.

The previous prime is 23131203107. The next prime is 23131203143. The reversal of 23131203131 is 13130213132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23131203131 is a prime.

It is a super-2 number, since 2×23131203131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131203101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386345 + ... + 442181.

It is an arithmetic number, because the mean of its divisors is an integer number (2902180050).

Almost surely, 2^23131203131 is an apocalyptic number.

23131203131 is a deficient number, since it is larger than the sum of its proper divisors (86237269).

23131203131 is a wasteful number, since it uses less digits than its factorization.

23131203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57373.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 23131203131 its reverse (13130213132), we get a palindrome (36261416263).

The spelling of 23131203131 in words is "twenty-three billion, one hundred thirty-one million, two hundred three thousand, one hundred thirty-one".